You can check the readme file to see where the games are being saved to. It's saved in applocale for reference. Something on your computer might be clearing stuff out without you knowing, so check what's running on it. The save files themselves shouldn't delete unless you do it yourself
Thanks for the assistance on this, I have looked through the ReadMe file but I haven't been able to find any App data on my windows computer for the game ( even after enabling viewing of hidden files and folders ) so either my computer really doesn't like this game and files, or I'm a blind fool and it is staring me in the face.
Either way I'm going to keep trying to get it to keep a save for more than a few days, been a real fun game though so can't wait to see how it continues to improve.